Raphael is twice as old as his sister. The sum of their ages is less than 30. What is the greatest age Raphael sister can be?
1 answer:
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<h2>Answer:</h2>
Option: C is the correct answer.
C.) x = −3.8, 3
<h2>Step-by-step explanation:</h2>The function f(x) is given by:
and the function g(x) is given by:
Now, we are asked to find the solution of the equation:
i.e. we have to find the value of x such that both the functions are equal i.e.
Now, on solving the equation using the quadratic formula i.e. the solution of the equation:
is given by:
Here we have:
Hence, the solution is given by: